Crystal detector for wireless receiving sets



Sept. 22, 1925. 1,554,540

v. T. MILLER CRYSTAL DETECTOR FOR WIRELESS RECEIVING SE TS Filed March 10, 1923 Patented Sept. 22, 1925 UNITED STATES VOLNEY T. MILLER, OF KANSAS CITY, MISSOURI.

CRYSTAL DETECTOR FOR WIRELESS RECEIVING SETS.

Application fi1ed March 10, 1923. Serial No. 624,148.

To all whom it may concern:

Be it known that I, VOLNEY T. MILLER, a citizen of the United States, and residing at 3908 Holmes Street, Kansas City, in the county of Jackson, State of Missouri, have invented a new and useful Crystal Detector for Wireless Receiving Sets.

The invention relates to a detector intended for use in radio work or more particularly to the type known as crystal detectors. The object of the invention is to provide a detector element with a simple, and inexpensiv mounting which will give uniform service and which will give a maximum exposure of the detector element and at the same time give it a firm and attractive mounting.

Referring to the drawings Figure A is a perspective view of the mounted detector. Figure B is a cross section at aa-, Figure D. Figure C is a cross section at 0-7), liigure D. Figure l) is a top view of the device. Similar numbers refer to similar parts throughout the several views.

The crystal detector element 2 is imbedded in a metal mounting 1. This crystal detector element may be galena, silicon, pyrites of iron or any other detector material. The mounting is of suitable size and shape to fit the cup of a wireless set of the crystal detector type. It is preferably round with flat top and bottom, although it may be made square or other shapes if desired. The mounting may be made of VVoods metal or any other soft metal. The top of the mounting is lined with a series of small grooves and ricges running entirely across its face as shown in Figure D. A cross section of the crystal and mounting is shown in Figure B, showing the ridges which are designated as number 3 and the grooves as number 4.

The top of the crystal 2 is on a line with the bottom of the grooves 4, Figure B. The

high points or ridges 3 overlap the crystal slightly as shown by 5, Figure (1, thus forming a grip that securely holds the crystal in the position shown.

By reason of this method of mounting it is possible to mount very thin pieces of crystal, the overlapping edges 5 holding the crystal in place instead of the metal gripping the body of the crystal as is usual with the present method of mounting.

I claim 1. The combination of a crystal detector 55 element with a metal mounting, the said mounting having a series of parallel grooves across its face, the apex of part of said grooves having overlapping ends overlapping the edge of the crystal.

2. The combination of a crystal detector element with a metal mounting, the said mounting having a series of grooves or corrugations across its face, the high part of said grooves or corrugations that contact 5 with said crystal detector element having ends that overlap the top edge of the said crystal.

8. The combination of a crystal detector element with a metal mounting, the said mounting having one or more ridges or corrugations on its face, the part of the ridges or corrugations that contact with said crystal detector element overlapping the top edge of the said crystal.

4i. The combination of a crystal detector element with a metal mounting, the face of said combined product having one or more ridges or corrugations part of which overlap the edge of the crystal.

5. A crystal detector element imbedded in a metal mounting, the face of which has one or more ridges or corrugations overlapping the edge of the crystal.

VOLNEY T. MILLER. 

